1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
package specgen
import (
"strconv"
"strings"
"github.com/containers/common/pkg/util"
"github.com/containers/podman/v4/libpod/define"
"github.com/containers/podman/v4/pkg/rootless"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
)
var (
// ErrInvalidSpecConfig describes an error that the given SpecGenerator is invalid
ErrInvalidSpecConfig = errors.New("invalid configuration")
// SystemDValues describes the only values that SystemD can be
SystemDValues = []string{"true", "false", "always"}
// SdNotifyModeValues describes the only values that SdNotifyMode can be
SdNotifyModeValues = []string{define.SdNotifyModeContainer, define.SdNotifyModeConmon, define.SdNotifyModeIgnore}
// ImageVolumeModeValues describes the only values that ImageVolumeMode can be
ImageVolumeModeValues = []string{"ignore", "tmpfs", "anonymous"}
)
func exclusiveOptions(opt1, opt2 string) error {
return errors.Errorf("%s and %s are mutually exclusive options", opt1, opt2)
}
// Validate verifies that the given SpecGenerator is valid and satisfies required
// input for creating a container.
func (s *SpecGenerator) Validate() error {
// Containers being added to a pod cannot have certain network attributes
// associated with them because those should be on the infra container.
if len(s.Pod) > 0 && s.NetNS.NSMode == FromPod {
if len(s.Networks) > 0 {
return errors.Wrap(define.ErrNetworkOnPodContainer, "networks must be defined when the pod is created")
}
if len(s.PortMappings) > 0 || s.PublishExposedPorts {
return errors.Wrap(define.ErrNetworkOnPodContainer, "published or exposed ports must be defined when the pod is created")
}
if len(s.HostAdd) > 0 {
return errors.Wrap(define.ErrNetworkOnPodContainer, "extra host entries must be specified on the pod")
}
}
if s.NetNS.IsContainer() && len(s.HostAdd) > 0 {
return errors.Wrap(ErrInvalidSpecConfig, "cannot set extra host entries when the container is joined to another containers network namespace")
}
//
// ContainerBasicConfig
//
// Rootfs and Image cannot both populated
if len(s.ContainerStorageConfig.Image) > 0 && len(s.ContainerStorageConfig.Rootfs) > 0 {
return errors.Wrap(ErrInvalidSpecConfig, "both image and rootfs cannot be simultaneously")
}
// Cannot set hostname and utsns
if len(s.ContainerBasicConfig.Hostname) > 0 && !s.ContainerBasicConfig.UtsNS.IsPrivate() {
if s.ContainerBasicConfig.UtsNS.IsPod() {
return errors.Wrap(ErrInvalidSpecConfig, "cannot set hostname when joining the pod UTS namespace")
}
return errors.Wrap(ErrInvalidSpecConfig, "cannot set hostname when running in the host UTS namespace")
}
// systemd values must be true, false, or always
if len(s.ContainerBasicConfig.Systemd) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerBasicConfig.Systemd), SystemDValues) {
return errors.Wrapf(ErrInvalidSpecConfig, "--systemd values must be one of %q", strings.Join(SystemDValues, ", "))
}
// sdnotify values must be container, conmon, or ignore
if len(s.ContainerBasicConfig.SdNotifyMode) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerBasicConfig.SdNotifyMode), SdNotifyModeValues) {
return errors.Wrapf(ErrInvalidSpecConfig, "--sdnotify values must be one of %q", strings.Join(SdNotifyModeValues, ", "))
}
//
// ContainerStorageConfig
//
// rootfs and image cannot both be set
if len(s.ContainerStorageConfig.Image) > 0 && len(s.ContainerStorageConfig.Rootfs) > 0 {
return exclusiveOptions("rootfs", "image")
}
// imagevolumemode must be one of ignore, tmpfs, or anonymous if given
if len(s.ContainerStorageConfig.ImageVolumeMode) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerStorageConfig.ImageVolumeMode), ImageVolumeModeValues) {
return errors.Errorf("invalid ImageVolumeMode %q, value must be one of %s",
s.ContainerStorageConfig.ImageVolumeMode, strings.Join(ImageVolumeModeValues, ","))
}
// shmsize conflicts with IPC namespace
if s.ContainerStorageConfig.ShmSize != nil && (s.ContainerStorageConfig.IpcNS.IsHost() || s.ContainerStorageConfig.IpcNS.IsNone()) {
return errors.Errorf("cannot set shmsize when running in the %s IPC Namespace", s.ContainerStorageConfig.IpcNS)
}
//
// ContainerSecurityConfig
//
// userns and idmappings conflict
if s.UserNS.IsPrivate() && s.IDMappings == nil {
return errors.Wrap(ErrInvalidSpecConfig, "IDMappings are required when not creating a User namespace")
}
//
// ContainerCgroupConfig
//
//
// None for now
//
// ContainerNetworkConfig
//
// useimageresolveconf conflicts with dnsserver, dnssearch, dnsoption
if s.UseImageResolvConf {
if len(s.DNSServers) > 0 {
return exclusiveOptions("UseImageResolvConf", "DNSServer")
}
if len(s.DNSSearch) > 0 {
return exclusiveOptions("UseImageResolvConf", "DNSSearch")
}
if len(s.DNSOptions) > 0 {
return exclusiveOptions("UseImageResolvConf", "DNSOption")
}
}
// UseImageHosts and HostAdd are exclusive
if s.UseImageHosts && len(s.HostAdd) > 0 {
return exclusiveOptions("UseImageHosts", "HostAdd")
}
// TODO the specgen does not appear to handle this? Should it
// switch config.Cgroup.Cgroups {
// case "disabled":
// if addedResources {
// return errors.New("cannot specify resource limits when cgroups are disabled is specified")
// }
// configSpec.Linux.Resources = &spec.LinuxResources{}
// case "enabled", "no-conmon", "":
// // Do nothing
// default:
// return errors.New("unrecognized option for cgroups; supported are 'default', 'disabled', 'no-conmon'")
// }
invalidUlimitFormatError := errors.New("invalid default ulimit definition must be form of type=soft:hard")
// set ulimits if not rootless
if len(s.ContainerResourceConfig.Rlimits) < 1 && !rootless.IsRootless() {
// Containers common defines this as something like nproc=4194304:4194304
tmpnproc := containerConfig.Ulimits()
var posixLimits []specs.POSIXRlimit
for _, limit := range tmpnproc {
limitSplit := strings.SplitN(limit, "=", 2)
if len(limitSplit) < 2 {
return errors.Wrapf(invalidUlimitFormatError, "missing = in %s", limit)
}
valueSplit := strings.SplitN(limitSplit[1], ":", 2)
if len(valueSplit) < 2 {
return errors.Wrapf(invalidUlimitFormatError, "missing : in %s", limit)
}
hard, err := strconv.Atoi(valueSplit[0])
if err != nil {
return err
}
soft, err := strconv.Atoi(valueSplit[1])
if err != nil {
return err
}
posixLimit := specs.POSIXRlimit{
Type: limitSplit[0],
Hard: uint64(hard),
Soft: uint64(soft),
}
posixLimits = append(posixLimits, posixLimit)
}
s.ContainerResourceConfig.Rlimits = posixLimits
}
// Namespaces
if err := s.UtsNS.validate(); err != nil {
return err
}
if err := validateIPCNS(&s.IpcNS); err != nil {
return err
}
if err := s.PidNS.validate(); err != nil {
return err
}
if err := s.CgroupNS.validate(); err != nil {
return err
}
if err := validateUserNS(&s.UserNS); err != nil {
return err
}
// Set defaults if network info is not provided
// when we are rootless we default to slirp4netns
if s.NetNS.IsPrivate() || s.NetNS.IsDefault() {
if rootless.IsRootless() {
s.NetNS.NSMode = Slirp
} else {
s.NetNS.NSMode = Bridge
}
}
if err := validateNetNS(&s.NetNS); err != nil {
return err
}
if s.NetNS.NSMode != Bridge && len(s.Networks) > 0 {
// Note that we also get the ip and mac in the networks map
return errors.New("Networks and static ip/mac address can only be used with Bridge mode networking")
}
return nil
}
|
